Sophos users have been proactively protected against a worm which exploits a zero day vulnerability in the way that Microsoft Windows handles animated cursors (.ANI files).  Microsoft have subsequently released an urgent security patch (a week ahead of schedule) to remedy the vulnerability.

The worm, which Sophos proactively detects using Behavioral Genotype® Protection as Mal/Behav-010 without requiring an update, infects executable and HTML files. 

To learn more about both the animated cursor vulnerability and how Sophos addresses endpoint security view the full article via the following link:

Sophos Proactively Prevents ANI Worm